Q2 of 39 Page 143

How do endocrine glands differ from other glands?

Endocrine glands are different from other glands as they are ductless glands i.e. they pour their secretions hormones directly into the bloodstream.


Other glands are called duct glands or exocrine glands where secretions are carried through ducts.


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6

Match the conditions in Column A with the cause in Column B.































A (Condition)



B (Cause)



(a) Dwarfism and mental retardation



(i) Shortage of glucose in blood.



(b) Diabetes mellitus



(ii) Oversecretion of growth hormone.



(c) Excess of glucose in blood.



(iii) Insulin shock.



(d) Gigantism



(iv) Oversecretion of thyroxine



(e) Enlargement of breasts in adult males



(v) Hypothyroidism



(f) Exophthalmic goiter



(vi) Oversecretion of cortical hormones.


 1

Mention which of the statements are true (T) and which are false (F). Give reason in support of your answer.

(a) Adrenaline is often described as the emergency hormone. (T/F)


(b) There are two kinds of diabetes (mild and severe) related to two different hormones. (T/F)


(c) Simple goitre can be prevented by using iodized salt in food. (T/F)


(d) Pituitary is popularly called the master gland. (T/F)


(e) Hormones "obey" the commands like "enough, slow down or "too little, speed up". (T/F)


(f) Gigantism and dwarfism in humans basically depend on the quality and quantity of the food eaten during the early growing age. (T/F)

 3

Mention any two differences between a hormone and an enzyme.

 4

Do you agree with the statement – “All hormones are chemical signals”? Yes/No. Justify your answer.